Low-pressure boiler



'MY'Z'L 1930- Al.. couR'ro'r Y' Y Low PRESSURE BOILER 2 Sheets-Sheet 1 y Filed March 24. 1926 /NvE/VTOR A www; my?

May 27, 193.0. L. coURToT i 1,760,399 n LOW PRESSURE BOILER l Filed March 24, 1926 2 Sheets-Sheet 2 UNITED sT Patented Maj," 27, 1930 TES PATENT OFFICE Louis coniarofr,` or PARIS, FRANCE, AssrGNon rro AMERICAN RADIATOR COMPANY, or

Nnw Yoan, N. A CORPORATION or Nnw Jan-.snr

p LOWPEESSURE IBOILER` Application ledv March 24, 1926", Serial No. 96,941, `and `in France March 25, 1925.

. (My invention has for its object to provide a low pressure boiler of small size for a given y output and in which the lheatis utilizedV in the best conditions. p i A To this effect the said boiler7 "whereof the main body consists of tubular panels providy ing for water circulation, comprises on at i least one of its sides, lines orchannels for the evacuation of smoke which flues or channels 10 are formed by two sets of tubular panels having the parallel positio-n and by two general collectingconduits which are connected with y the particular collecting conduits of the said panels andare horizontallydisposed above i5 and belowthe said channels. The latter may be provided `withone or more intermediate partitions as baflies for the circulation of the smoke whereby the heatlof combustion will be properly utilized. y y

The rooff the boilerfurnace consists of firebrick or like refractory material in order to provide for the complete combustion of the gas distilled by the combustion which might ascend into the upperl part of the furnace 25 withoutbeing ignited. `In the saidlfurnace roof is preferably `disposeda metal conduit which serves as a support for the firebrick elements and also to introduce intothe combustion chamber a supply of air which has been heated by contactwith the walls of the boiler in order.V to aid in: the completecombustion of the said distilledgas.` y A IThe appended drawings show by way of example a constructionall form "of boiler according to my said invention.

Fig. l is a side elevation of the boiler, with parts in section on the lines `A--A and B-B, and with parts broken away according `t the line C-G of Fig. 2. y

1 Fig.` 2 is a' half plan view and a half hori` zontal section. Y

Fig. 3is a half rear elevation and a half cross section of the boiler.

` The boiler `herein represented has a rectangular shape, and its two lateral faces are each constituted by two parallel rows of tubularpanels l, each row comprising five panels, as shown in Fig. 2, this number is variable with the capacity of the boiler which is to be constructed. Each panel comprises a plurality of verticalchannels which are separated by solid parts and are connectedtogether by an upper collecting conduit 2 and a lower collecting conduit 3.

The front and rear faces also consist of panels Of thesame kind which are disposed in single rows; in the front face is provided a loading door 4 andan ash pit door 5. The rear face comprises the lateral `apertures connecting the channels formed between the panels l with a smoke boX 8; the latter is provided with a conduit 6 for connection with the stack and is fitted with a damper Tas well as with doors for regulating the draft and for cleaning purposes, not shown.

The upper collecting conduits 2 and the lower collecting conduits 3 of the panels l are connected together and to the general col.

lecting conduits 9 and l() which are disposed between the same at the u per and lower part of the said channels. n like manner, the upper and lower collectingconduits at the front and rear communicate with theends of the general collecting conduits 9 `and 10, for instance as shown at the lower part of Fig. l.

The two lower general collectors l() are connected together by a conduit ll supplying the return water of the plant; the two upper collectors 9 are in like manner connected together by a conduit l2 provided with a neck 1 3 which is connected to the hot water-discharge conduit. Instead of being placed at the front as shown, the conduit 12 may be disp` posed upon thetop of the boiler, the connec- -tion being madev directly with the general collectors `9. i Y y y The panels `of the inner rows on the sides of the boiler have at the top the` apertures ll (two per panel) `serving to connect. the com.- bustion chamber of the boiler,` situated above the grate l5, with theinterior of the said channels. Each ofthe channels is provided with a horizontal partition 16 which serves as a baiilelfor the circulation ofthe gas; above the said partition the gas circulates forwardly7 then tothe lower part,and rearwardly,

`and proceeds into the stack through the box 8.` A

The roof or crown member of the boiler furnaoelconslsts of elements made offirebrick, Vasbestos composition, or the like, shown at 17, and on the axis of the said roof is disposed the metallic conduit 18 whose ends are secured to the front and rear panels of the boiler. At the rear of the conduit 18 is the discharge end of an air supply conduit 19 which is disposed against the rear end of the boiler; in the bottom of said conduit 18 Vabout to enter the said rvchannels, so/that the complete combustion of the gas will be insured.` Q 'l For the air circulation conduit `18 aiding `in the combustion. II may substitute a tube or like hollow member affording a water circulation which is connected at its ends with the front and rear panels, or otherwise, a simpleA solid c'rosspiec'e supporting the rcfractory elements 17 should they'be shorter than thewidth of the boiler.

From the preceding' considerations, it will be observed that'y aboilerpthus constructed will offer the following advantages:

By reason of tlielsmall size and lightweight of the` constructive parts of the boiler. the construction, `erection and transportation of the boiler may be carried out with great facility. J

Due to the disposition of the tubular panels on both sides of the channels, the boiler will possess alarge heat-transmitting surface.

Relatively to its size,ithe boiler possesses a large grate surfaceand a largerfuel capacity. i i

' The apparatusoccupies a small'space for a given output.. i f "5 The water circulation is effected: at a more rapid rate thanin the known low `]ir'essure boilers. f i The combustion of the gasis complete, due to the refractory roof of the furnace and to the arrangement Vof the conduit .18 and the channel apertures 14; the reduction in the heating surface corresponding to the presence of thefsaid roof is amply compensated by the improved combustion, which is completed in the said channels. y

Obviously, the said invention is not limited. to the constructional form which is hereinbefore described by way of example; for instancethe number-of channels Vis optional, and each may comprise a suitable number of partitions 16 offering 11n-increased path for the gas before its evacuation. Y

Should the said boiler be employed for producing low pressure steam, a receptacle serv- 2. A boiler of the character described comprising a plurality of vertical fluid-'containing panels forming thel fuel receptacle, and flues laterally thereof, a duct for supplying secondary air tosaid fuel receptacle disposed longitudinally of the boiler at "the top' thereof, a crown member of refractory material supported by said panelsand said-duct, 4certain of said panels having openings adjacent to said crown member t-o-provide outlets from said fuel-receptacle to saidfflues, substantially as specified. Y Y f I A boilerof the "character described comprising a plurality of longitudinally and transversely extending vertical fluid-containing panels forming'the fuel receptacle, a plurality of longitudinally l extendingV vertical fluid-containing panels disposed in spaced relation to said first-named longitudinally extending panels, headersdisposed at thc upper and lower ends'of said spaced panels communicating therewith and forming therewith enclosed longitudinal flues at the' opposite sides of the boiler, a longitudinal. secondary air duct disposed centrally longitudinally of the boiler at the top thereof, a

crown member at the top of the'b'oiler composed of elements of refractory material supported by said panels and said duct, the inner of lsaid longitudinal'V ypanels havingl openings therein adjacent to saidfcrown member to provide outlets from said' fuel receptacle to said fines. substantially asspecified.

In testimony whereof I have hereunto affixed my signature.` l LOUISv COURTOT. 

